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Re: File extensions spoofable in MSIE download dialog
From: "'StatiC'" <static () tampabay rr com>
Date: Thu, 29 Nov 2001 13:49:12 -0500

It appears only IE5.5 has this problem.  I just tested with IE5.0 sp2 and IE6 and both of those version prompt and wait 
for user intervention for readme.txt and then wait a second time while prompting to ask to open/saveas calc.exe.

IE5.5 will prompt the user for the initial readme.txt but the next open dialog that appears for the .exe goes through 
immediately without user intervention and executes.

I have tested 2 seperate IE5.5 systems(one was a new install with default IE5.5 sp2 settings) and they both execute the 
calc.exe file without giving the user a choice after the initial readme.txt dialog.


On Thu, Nov 29, 2001 at 07:03:21PM +0100, chef wrote:
  -----Urspr√ľngliche Nachricht-----
Von: StatiC [mailto:static () tampabay rr com] 
Gesendet: Donnerstag, 29. November 2001 03:52

I was playing with apache configs a few months ago and 
noticed a similar issue with IE5.5.  The procodure below will 
cause IE5.5 to display the open dialog for readme.txt but 
once opened, it executes immediately on IE5.5 sp2 with no 
hint that it is really getting an executable file called 
calc.exe.  I only tested it with IE5.5.

I testet it right now, with IE6; Q312461 / WinXP and i think
there is no problem at all.

First a question for text.txt pops up and when i say "open"
a second message with question for save / open pops up.
This second popup tells the right name "calc.exe" .
Finally when i say "open" it opens the calculator.

For testing: http://www.geilerserver.de/text.txt

Why does microsoft think it is wise to trust the filename in 
the url over what the header content-type is set to for 
display purposes since the content-type seems to take 
priority for what will really happen with the file.

I think that's only a Problem of older Versions.


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